1)Term used in situations of aggression when you are telling the other person you are going to kick their ass.
2)When your girlfriend has become such a huge pain in your ass you don't care about anything but getting rid of her.
1)Don't fuck with me man, I'm tired of your shit. I'll drop ya like a used rubber.
2)Bitch, you have fucked with my life so bad I gotta drop ya like a used rubber.